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Proceedings Paper

Layout-free dewarping of planar document images
Author(s): Masakazu Iwamura; Ryo Niwa; Akira Horimatsu; Koichi Kise; Seiichi Uchida; Shinichiro Omachi
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Paper Abstract

For user convenience, processing of document images captured by a digital camera has been attracted much attention. However, most existing processing methods require an upright image such like captured by a scanner. Therefore, we have to cancel perspective distortion of a camera-captured image before processing. Although there are rectification methods of the distortion, most of them work under certain assumptions on the layout; the borders of a document are available, textlines are in parallel, a stereo camera or a video image is required and so on. In this paper, we propose a layout-free rectification method which requires none of the above assumptions. We confirm the effectiveness of the proposed method by experiments.

Paper Details

Date Published: 19 January 2009
PDF: 10 pages
Proc. SPIE 7247, Document Recognition and Retrieval XVI, 72470X (19 January 2009); doi: 10.1117/12.806122
Show Author Affiliations
Masakazu Iwamura, Osaka Prefecture Univ. (Japan)
Ryo Niwa, Osaka Prefecture Univ. (Japan)
Akira Horimatsu, Osaka Prefecture Univ. (Japan)
Koichi Kise, Osaka Prefecture Univ. (Japan)
Seiichi Uchida, Kyushu Univ. (Japan)
Shinichiro Omachi, Tohoku Univ. (Japan)

Published in SPIE Proceedings Vol. 7247:
Document Recognition and Retrieval XVI
Kathrin Berkner; Laurence Likforman-Sulem, Editor(s)

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